Dumping-door-operating mechanism.



No. 887,837. PATENTED MAY 19, 1908.

- S. OTIS.

DUMPING DOOR OPERATING MECHANISM.

APPLICATION FILED APR. 24.1906.

000 'XOO 8 09 90a) 9Q 00 UNITED STATES PATENT oFF-Ion.

' SPENCER OTIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO NATIONAL DUMP CARCOMPANY, A

CORPORATION OF MAINE.

DUMPING-DOOR OBERATING MECHANISM.

Specification of Letters Patent.

Patented May 19, 1908.

Application filed April 24, 1906. Serial No. 318,464.

.is a transverse sectional elevation of part of a dump car, showing myinvention applied thereto. Fig. 2 is a longitudinal elevation of myimproved push-arm. Fig. ,3 is a bot tom plan viewthereof.

In the drawing, I have shown in Fig. 1a part of a-dump car having abottom comprising dumping doors e. e is an operating shaft suitablyconnected by 'a crank arm e and the push-arm-hereinafter described to areciprocating bar 6 traveling on a track e ,'whi ch track is connectedto the under side of the door. and well-known in the art and neednofurther description.

My invention relates specifically to the construction of the pusharmconnectingthe crank c with the reciprocating bar. This These parts arecommon.

push-arm comprises a channeled bar having an-upper web or plate a, withside flanges b integral therewith. -At its inner end, this gush-arm isof suflicient width to receive, etween the side flanges, the end of thecrank e and at this end it is provided with suitable perforations c inits side flanges for receiving a transverse hinge 0r pin 0 for the crankarm; Toward its forward end the web of the channeled bar is narrowed, asat a forming a. narrow forward extensiona the side flanges being widenedat these points, as at b, 6 The Widening of the side flanges is for thepurpose of providing a-sufiicient space for the erforations d whichreceive the reciprocating ar e +this bar being of greater diameter thanthe hinge of the crank arm.

My improved push-arm may be conveniently formed of ressed metal, as willbe readily understoo g It will be seen that I have provided a pusharnlwhich is exceedingly strong and well adapted for' the purpose for whichit is used.

I claim; A push arm for dumping door operating mechanism, consisting ofa channeled bar having perforations in its flanges, the flanges beingwidened and the web narrowed at one

